Synthesis and characterisation of beta-ketoesterate complexes of yttrium, barium and copper(II): New precursors for liquid injection MOCVD?

A serie of M(mpa), derivatives (M = Y, Ba, Cu; mpaH = methylpivaloylacetate ; x = 2 or 3) and their adducts M(mpa)(x)L-y [L = TMEDA (N,N,N',N'-tetramet hylethane-1,2-diamine), 2,2';bipyridine, diglyme and 18-crown-6 ether; y = 1, 2] were synthesised and fully characterised. X-ray structure determinati ons of Ba(mpa)(2)(TMEDA)(2) and Y(mpa)(3)(bipy) are described. Better solub ility properties than the M(thd)(x) analogues (thdH = 2,2,6,6-tetramethylhe ptane-3,5-dione), in non polar and polar solvents such as hexane and diglym e, have proved promising metal-oxide Liquid Injection MOCVD precursors. The ir thermal behaviour was investigated by thermogravimetric analysis.